Supposing the prices they charge are still less than what you would pay for the convenience of purchasing a product with no extra effort, why would you switch?

I have myself had aspirations to buy fewer things from Amazon. However. Even including stuff like this, I am happy to pay $10 extra to not have to dick around.

I hope Amazon has to pay money for this and that it hurts their business model, bit as a customer they are still scratching my itch 2 times out of 3.